Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment
Recently it has been suggested that the major influence on the environment from Siberian Traps magmatism was due to the interaction of magma and organic-rich shale and petroleum-bearing evaporites, with the subsequent creation and outburst of toxic gases (Siberian gas venting: SGV model). In part th...
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ELSEVIER SCIENCE BV
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/7917 |
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| author | Paton, M. Ivanov, A. Fiorentini, M. McNaughton, Neal Mudrovska, I. Reznitskii, L. Demonterova, E. |
| author_facet | Paton, M. Ivanov, A. Fiorentini, M. McNaughton, Neal Mudrovska, I. Reznitskii, L. Demonterova, E. |
| author_sort | Paton, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Recently it has been suggested that the major influence on the environment from Siberian Traps magmatism was due to the interaction of magma and organic-rich shale and petroleum-bearing evaporites, with the subsequent creation and outburst of toxic gases (Siberian gas venting: SGV model). In part this idea was supported by a U-Pb age of 252.0 +/- 0.4 Ma for one of the dolerite sills in the southeastern Siberian Traps: the age corresponds to the Permo-Triassic boundary and its known mass extinctions of biota. In this study two other dolerite sills were dated using zircons by the U-Pb SHRIMP method at 254.2 +/- 2.3 Ma and 249.6 +/- 1.5 Ma. The former age is in agreement within error with the age previously published for the dolerite sills, whereas the latter age is in agreement with U-Pb ages published for lava and intrusions from the northern Siberian Traps. The new ages corresponds to the Cahngshingian/Wuchiapingian or Permian/Triassic and Spathian/Smithian boundaries, respectively. Review of Ar-40/Ar-39 and U-Pb SHRIMP ages previously published for the southeastern Siberian Traps shows that three other pulses of magmatism probably took place at respectively Anisian/Spathian, Late/Middle Anisian and Landian/Anisian boundaries. Thus it is possible that the SVG model can be applied also to lesser biotic extinctions and recoveries in proximity and aftermath to the main Permo-Triassic extinction. (C) 2010, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved. |
| first_indexed | 2025-11-14T06:18:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-7917 |
| institution | Curtin University Malaysia |
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| last_indexed | 2025-11-14T06:18:27Z |
| publishDate | 2010 |
| publisher | ELSEVIER SCIENCE BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-79172017-09-13T16:02:56Z Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment Paton, M. Ivanov, A. Fiorentini, M. McNaughton, Neal Mudrovska, I. Reznitskii, L. Demonterova, E. Quantitative Tool Age Extinction Undisturbed Rocks Systematic-Errors Flood-Basalt Volcanism Detecting Alteration Time-Scale Ar-40/Ar-39 Geochronology Evolution Recently it has been suggested that the major influence on the environment from Siberian Traps magmatism was due to the interaction of magma and organic-rich shale and petroleum-bearing evaporites, with the subsequent creation and outburst of toxic gases (Siberian gas venting: SGV model). In part this idea was supported by a U-Pb age of 252.0 +/- 0.4 Ma for one of the dolerite sills in the southeastern Siberian Traps: the age corresponds to the Permo-Triassic boundary and its known mass extinctions of biota. In this study two other dolerite sills were dated using zircons by the U-Pb SHRIMP method at 254.2 +/- 2.3 Ma and 249.6 +/- 1.5 Ma. The former age is in agreement within error with the age previously published for the dolerite sills, whereas the latter age is in agreement with U-Pb ages published for lava and intrusions from the northern Siberian Traps. The new ages corresponds to the Cahngshingian/Wuchiapingian or Permian/Triassic and Spathian/Smithian boundaries, respectively. Review of Ar-40/Ar-39 and U-Pb SHRIMP ages previously published for the southeastern Siberian Traps shows that three other pulses of magmatism probably took place at respectively Anisian/Spathian, Late/Middle Anisian and Landian/Anisian boundaries. Thus it is possible that the SVG model can be applied also to lesser biotic extinctions and recoveries in proximity and aftermath to the main Permo-Triassic extinction. (C) 2010, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved. 2010 Journal Article http://hdl.handle.net/20.500.11937/7917 10.1016/j.rgg.2010.08.009 ELSEVIER SCIENCE BV restricted |
| spellingShingle | Quantitative Tool Age Extinction Undisturbed Rocks Systematic-Errors Flood-Basalt Volcanism Detecting Alteration Time-Scale Ar-40/Ar-39 Geochronology Evolution Paton, M. Ivanov, A. Fiorentini, M. McNaughton, Neal Mudrovska, I. Reznitskii, L. Demonterova, E. Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment |
| title | Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment |
| title_full | Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment |
| title_fullStr | Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment |
| title_full_unstemmed | Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment |
| title_short | Late Permian and Early Triassic magmatic pulses in the Angara-Taseeva syncline, Southern Siberian Traps and their possible influence on the environment |
| title_sort | late permian and early triassic magmatic pulses in the angara-taseeva syncline, southern siberian traps and their possible influence on the environment |
| topic | Quantitative Tool Age Extinction Undisturbed Rocks Systematic-Errors Flood-Basalt Volcanism Detecting Alteration Time-Scale Ar-40/Ar-39 Geochronology Evolution |
| url | http://hdl.handle.net/20.500.11937/7917 |